1. THE CELL THEORY
1. All living things are composed of cells.
2. Cells are the basic unit of structure & function in living things.
3. New cells are produced by existing cells.

2. Cells are the basic unit of life.
Cells come in all different shapes & sizes.
All living things are made up of cells!

3. Structures common to most cells
1. cell membrane
2. DNA
3. cytoplasm

4. T.E.M. 15,000X

5. Basic Types of Cells
Prokaryotic cells: contain no nucleus or other membrane-bound organelles
Simpler
Most unicellular cells
Eukaryotic: contain a membrane-bound nucleus and membrane-bound organelles
More complex
Most multicellular cells

6. Cellular Parts
Nucleus: a distinct central organelle that contains the cell’s genetic material in the form of DNA.
Organelle: specialized structures that carry out specific cell functions.

7. Cellular Parts

8. Basic Types of Cells